PURPORT

The adhirudha ecstasies are explained in the Ujjvala-nilamani [13.170]:

rudhoktebhyo 'nubhavebhyah
kam apy apta visistatam
yatranubhava drsyante
so 'dhirudho nigadyate

The very sweet attraction of conjugal love increases through affection, counter-love, love, attachment, subattachment, ecstasy and highly advanced ecstasy (mahabhava). The platform of mahabhava includes rudha and adhirudha. These platforms are possible only in conjugal love. Advanced ecstasy is found in Dvaraka, whereas highly advanced ecstasy is found among the gopis.